diff --git a/libavformat/oggparsevorbis.c b/libavformat/oggparsevorbis.c
index 29e6d91b68..b116273f8c 100644
--- a/libavformat/oggparsevorbis.c
+++ b/libavformat/oggparsevorbis.c
@@ -146,7 +146,7 @@ fixup_vorbis_headers(AVFormatContext * as, oggvorbis_private_t *priv,
         memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
         offset += priv->len[i];
     }
-    *buf = av_realloc(*buf, offset);
+    *buf = av_realloc(*buf, offset + FF_INPUT_BUFFER_PADDING_SIZE);
     return offset;
 }